Phymorhynchus buccinoides is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
The Japanese name of this species is Tsubunari-shajiku.
The type locality is off Hatsushima, Sagami Bay, 35ð00.2' N, 139ð13.5' E, Japan in depth 1160 m.
There is no known other locality up to 2005.
It lives in seeps.